How to do the following two for loop?

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M
M 2023-2-9
评论： M 2023-2-10
How to do the following two for loop?
i=0.1:0.1:0.9 ;
M=[1 1 1 1 1 1];
first outer loop :
In the 1st inner loop Assign i=0.9 on the first element, then in the 2nd inner loop Assign 0.8 on the first element till 0.1
then 2nd outer loop
In the 1st inner loop Assign i=0.9 on the 2nd element, in the 2nd inner loop Assign 0.8 on the 2nd element till 0.1
.
.
and so on .. till the 6th outer loop

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采纳的回答

Torsten
Torsten 2023-2-9
Ran in:
You mean
i=0.1:0.1:0.9 ;
M = [i.',ones(numel(i),5)]
M = 9×6
0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000
?
  9 个评论
显示 7更早的评论
Torsten
Torsten 2023-2-10
编辑：Torsten 2023-2-10
That's exactly what the code does (see above).
Or do you want the element of the outer loop remain at 0.1 instead of resetting it to 1 ?
Then delete the line
M(i) = 1.0;
M
M 2023-2-10
@Torsten yes i deleted that line and now its working good. Thanks

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更多回答（2 个）

Image Analyst
Image Analyst 2023-2-9
Ran in:
Don't call variables "i" -- it's the imaginary constant.
Try this, for example to multiply M by 2
vec = 0.1:0.1:0.9
vec = 1×9
0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 0.9000
M = [vec 1 1 1 1 1]
M = 1×14
0.1000 0.2000 0.3000 0.4000 0.5000 0.6000 0.7000 0.8000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000
result = M * 2
result = 1×14
0.2000 0.4000 0.6000 0.8000 1.0000 1.2000 1.4000 1.6000 1.8000 2.0000 2.0000 2.0000 2.0000 2.0000
% Or via a for loop
for k = 1 : numel(vec)
result(k) = 2 * M(k);
end
To learn other fundamental concepts, invest 2 hours of your time here:
MATLAB Academy - Free 2 hour training
Image Analyst
Image Analyst 2023-2-10
Ran in:
"assign i=0.9 on the first element, then assign 0.8 on the first element till 0.1"
Try this
for k = 1 : 9
result(k) = (10 - k) * 0.1;
end
result
result = 1×9
0.9000 0.8000 0.7000 0.6000 0.5000 0.4000 0.3000 0.2000 0.1000
  2 个评论
M
M 2023-2-10
I want to move into M=[i 1 1 1 1 1], it is an input for another function
Image Analyst
Image Analyst 2023-2-10
OK, so did you do it? Again, don't use "i" as the name of your variable. That is something everyone here advises against.
for k = 1 : 9
result(k) = (10 - k) * 0.1;
end
M = [result, 1 1 1 1 1]

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